Running very lean
10-25-2006, 04:13 PM
#11
3rd Gear Member
Join Date: Jun 2006
Location:
Posts: 713
RE: Running very lean
ORIGINAL: Wally39
By the way, sometimes it knocks at WOT and sometimes it don't. If that helps with a diagnosis. I'm going to put on a new MAF sensor I have and see if that helps.
By the way, sometimes it knocks at WOT and sometimes it don't. If that helps with a diagnosis. I'm going to put on a new MAF sensor I have and see if that helps.
If you have a MAF handy, I'd try that and again double check wiring, hoses, etc...
If you have a tuner - grab some MAF/O2 data as well... erratic readings at idle will tell you if there is something on the electrical side...
I understand that some people have had tight clearances with the CAI hoses on Saleens (I have the 98mm "extreme" intake, so I don't know) and either used lowering mounts or even heated the intake and bent it down. Is it possible your's is rubbing on the hood and unseating, cracking, or knocking the PCV connections out?
10-25-2006, 04:57 PM
#12
4th Gear Member
Thread Starter
Join Date: Mar 2006
Location:
Posts: 1,547
RE: Running very lean
I think I might have found the problem. I went to put in the new MAF sensor and the clamp on the throttle body was loose. I tightened everything up and I can hear it sucking air throught the filter. Seems to run alot better. Like you said the hood rubbing on the intake hose must have unseated and loosened it up. Mine rubs even with the engine lowering mounts.
I'm taking it to the dyno shop again to check it out.
I'm taking it to the dyno shop again to check it out.
10-25-2006, 10:05 PM
#14
5th Gear Member
Join Date: Dec 2004
Location: Small walk way by big walk way
Posts: 4,717
RE: Running very lean
I have seen the fuel air mixture on the SCT. I hope I said that right. In other words it should be able to be adjusted. I assume that I'm too running lean because every since I've gotten tunes I have had this problem. I once ran the 87 tune with 93 gas and that corrected the condition but then I got the new 93 tune and it rocked so hard that I rather be easy on the throttle then go back to the other tune. Soon I too will go in for the dyno and I'm praying everything is rectified then. Right now I kind of know when it can happen and when it doesn't. I have also have used octane boosters. It's a shame I feel like I have been cheated some what because I believe I am one of the few with this problem. I have been told my car has more timing than others. When I drove my buddy's car when he still had it , I recognize immediately it didn't have the power mind did. Oh well hoping soon things will be better until then the cooler weather has helped some.
10-25-2006, 10:07 PM
#15
3rd Gear Member
Join Date: Jun 2006
Location:
Posts: 713
RE: Running very lean
ORIGINAL: Wally39
Thought it was fixed, but then it started knocking sometimes again. Even under partial throttle. This is very frustrating.
Thought it was fixed, but then it started knocking sometimes again. Even under partial throttle. This is very frustrating.
That said, do you have a tuner that can log A/F data? That would take some of the guesswork out of it...
10-25-2006, 10:48 PM
#16
4th Gear Member
Thread Starter
Join Date: Mar 2006
Location:
Posts: 1,547
RE: Running very lean
I think I will disconnect the battery cable like you said for a minute or so and see what happens. Sorry for your knocking problem, but it's nice to know I'm not the only one with this problem. My brother thinks it's a vacuum leak somewhere.
10-25-2006, 11:38 PM
#17
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Running very lean
Did you install the SC? Why couldn't they adjust things with the SCT? Must be JDM locking you out cause I can change a lot of things with mine.
ORIGINAL: Wally39
I think I will disconnect the battery cable like you said for a minute or so and see what happens. Sorry for your knocking problem, but it's nice to know I'm not the only one with this problem. My brother thinks it's a vacuum leak somewhere.
I think I will disconnect the battery cable like you said for a minute or so and see what happens. Sorry for your knocking problem, but it's nice to know I'm not the only one with this problem. My brother thinks it's a vacuum leak somewhere.
10-25-2006, 11:39 PM
#18
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Running very lean
Didn't you call brent for a new tune? Being easy on the throttle is a poor solution. What's the point if you're afraid to step on it?
ORIGINAL: Daniel60
I have seen the fuel air mixture on the SCT. I hope I said that right. In other words it should be able to be adjusted. I assume that I'm too running lean because every since I've gotten tunes I have had this problem. I once ran the 87 tune with 93 gas and that corrected the condition but then I got the new 93 tune and it rocked so hard that I rather be easy on the throttle then go back to the other tune. Soon I too will go in for the dyno and I'm praying everything is rectified then. Right now I kind of know when it can happen and when it doesn't. I have also have used octane boosters. It's a shame I feel like I have been cheated some what because I believe I am one of the few with this problem. I have been told my car has more timing than others. When I drove my buddy's car when he still had it , I recognize immediately it didn't have the power mind did. Oh well hoping soon things will be better until then the cooler weather has helped some.
I have seen the fuel air mixture on the SCT. I hope I said that right. In other words it should be able to be adjusted. I assume that I'm too running lean because every since I've gotten tunes I have had this problem. I once ran the 87 tune with 93 gas and that corrected the condition but then I got the new 93 tune and it rocked so hard that I rather be easy on the throttle then go back to the other tune. Soon I too will go in for the dyno and I'm praying everything is rectified then. Right now I kind of know when it can happen and when it doesn't. I have also have used octane boosters. It's a shame I feel like I have been cheated some what because I believe I am one of the few with this problem. I have been told my car has more timing than others. When I drove my buddy's car when he still had it , I recognize immediately it didn't have the power mind did. Oh well hoping soon things will be better until then the cooler weather has helped some.
10-26-2006, 01:52 AM
#19
2nd Gear Member
Join Date: Feb 2006
Location: Maryland
Posts: 355
RE: Running very lean
Wally39 - how long did you have the SC on before you had a problem with knocking? Are you SURE you didn't have any pinging before and just did not notice it?
moosestang - blip back over to your line lock thread if you get a chance.
moosestang - blip back over to your line lock thread if you get a chance.
10-26-2006, 07:15 AM
#20
5th Gear Member
Join Date: Dec 2004
Location: Small walk way by big walk way
Posts: 4,717
RE: Running very lean
We took out spark and it ran slower and one day somewhere it pinged anyway just like once. Who knows maybe the dyno will help. I have tried other tunes of his but to be honest for once it ran like a dead dog, I mean really slow.
ORIGINAL: moosestang
Didn't you call brent for a new tune? Being easy on the throttle is a poor solution. What's the point if you're afraid to step on it?
Didn't you call brent for a new tune? Being easy on the throttle is a poor solution. What's the point if you're afraid to step on it?
ORIGINAL: Daniel60
I have seen the fuel air mixture on the SCT. I hope I said that right. In other words it should be able to be adjusted. I assume that I'm too running lean because every since I've gotten tunes I have had this problem. I once ran the 87 tune with 93 gas and that corrected the condition but then I got the new 93 tune and it rocked so hard that I rather be easy on the throttle then go back to the other tune. Soon I too will go in for the dyno and I'm praying everything is rectified then. Right now I kind of know when it can happen and when it doesn't. I have also have used octane boosters. It's a shame I feel like I have been cheated some what because I believe I am one of the few with this problem. I have been told my car has more timing than others. When I drove my buddy's car when he still had it , I recognize immediately it didn't have the power mind did. Oh well hoping soon things will be better until then the cooler weather has helped some.
I have seen the fuel air mixture on the SCT. I hope I said that right. In other words it should be able to be adjusted. I assume that I'm too running lean because every since I've gotten tunes I have had this problem. I once ran the 87 tune with 93 gas and that corrected the condition but then I got the new 93 tune and it rocked so hard that I rather be easy on the throttle then go back to the other tune. Soon I too will go in for the dyno and I'm praying everything is rectified then. Right now I kind of know when it can happen and when it doesn't. I have also have used octane boosters. It's a shame I feel like I have been cheated some what because I believe I am one of the few with this problem. I have been told my car has more timing than others. When I drove my buddy's car when he still had it , I recognize immediately it didn't have the power mind did. Oh well hoping soon things will be better until then the cooler weather has helped some.